code: def forward(self, input_ids, attention_mask):
      # Only return lm_logits
      return self.model(
          input_ids=input_ids,
          attention_mask=attention_mask,
          use_cache=True,
      )[0]
  
file_path: colossalai/tests/test_auto_parallel/test_offload/model_utils.py
imports: import torch
  import torch.nn
  from transformers import BertConfig, BertLMHeadModel, GPT2Config, GPT2LMHeadModel
  from tests.components_to_test.registry import non_distributed_component_funcs
label_desc: Use image node_id 2 for calling the GPTLMModel obj's underlying member method code with example usage: obj.forward(input_ids, attention_mask) and returns: self